/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.beam.runners.dataflow.worker.fn.control;

import com.google.api.services.dataflow.model.CounterUpdate;
import javax.annotation.Nullable;
import org.apache.beam.model.pipeline.v1.MetricsApi.MonitoringInfo;

interface MonitoringInfoToCounterUpdateTransformer {

  /**
   * Method should transform MonitoringInfo to relevant CounterUpdate class as required for
   * DataflowRunner.
   *
   * @param src
   * @return CounterUpdate or null if MonitoringInfo is invalid/unsupported.
   */
  @Nullable
  CounterUpdate transform(MonitoringInfo src);
}
